Effects of Ultra-Fine Limestone Powder on Workability and Strength of High Strength Concrete

Abstract

With the increasing demand for high strength concrete, more attention has been paid to the problem of high viscosity mixture in high strength concrete technology by academic and engineering circles. This project studied the effects of ultra-fine limestone powder on the workability and viscosity of fresh concrete using the ultra-fine limestone powder (LP) obtained by ultra-fine grinding of limestone powder, building sandstone processing waste, as fine mineral admixture of high strength concrete. The experimental results show that the viscosity of fresh high strength concrete with ultra-fine limestone powder decreases significantly. At the same time, the influence of ultra-fine limestone powder on the strength of the concrete at different ages is very little.

The Influence and Application of Slag, Fly Ash, and Limestone Flour on Compressive Strength of Concrete Based on the Concrete Compressive Strength Development over Time (CCSDOT) Model

“…In recent years, urbanization and the rapid development of large-scale infrastructure have created a huge demand for concrete and Portland cement [1]. Considering environmental protection, energy conservation, and resource benefits [2], more and more supplementary cementitious materials, including slag [3], fly ash [4], and limestone flour [5], are added into concrete as partial cement replacement material. In addition, the three supplementary cementitious materials have significant influence on the compressive strength of concrete [6].…”

“…Adding limestone flour into concrete as a partial cement replacement has been a research hotspot over the past two decades. One of the most common utilizations for limestone flour, cited in the open literature, is as a mineral admixture to improve workability of concrete [5,18,19]. Moreover, limestone flour works well in reducing the expansion associated with sulfate attacks [20] and decreases the cumulative amount of heat produced during hydration [21].…”